Quantum oscillations in the parent pnictide BaFe 2 As 2 : Itinerant electrons in the reconstructed state
Quantum oscillations in the parent pnictide BaFe 2 As 2 : Itinerant electrons in the reconstructed state
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DOI：
10.1103/physrevb.80.064507
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发表时间：
2009-02
影响因子：
3.7
通讯作者：
J. Analytis;J. Analytis;R. McDonald;J. Chu;J. Chu;S. Riggs;A. Bangura;C. Kucharczyk;C. Kucharczyk;M. Johannes;I. Fisher;I. Fisher
中科院分区：
文献类型：
--
作者：
J. Analytis;J. Analytis;R. McDonald;J. Chu;J. Chu;S. Riggs;A. Bangura;C. Kucharczyk;C. Kucharczyk;M. Johannes;I. Fisher;I. Fisher
我们报告了能够直接观测费米表面低温基态${\text{BaFe}}_{2}{\text{As}}_{2}$的量子振荡测量。从这些测量中，我们描述了低能激发，揭示了费米表面在反铁磁状态下被重建，但在其尾迹中留下了流动的电子。目前的测量结果与反铁磁基态的传统能带折叠图像一致，对费米表面的拓扑结构和尺寸施加了重要的限制。
We report quantum-oscillation measurements that enable the direct observation of the Fermi surface of the low-temperature ground state of ${\text{BaFe}}_{2}{\text{As}}_{2}$. From these measurements we characterize the low-energy excitations, revealing that the Fermi surface is reconstructed in the antiferromagnetic state, but leaving itinerant electrons in its wake. The present measurements are consistent with a conventional band folding picture of the antiferromagnetic ground state, placing important limits on the topology and size of the Fermi surface.